Plena Mixer Amplifier Installation and User Instructions Description
en 8
An LED meter monitors the master output before the zone selection. This signal is also present on the headphone connector below the output meter. For total reliability and ease of use, a limiter is integrated into the output stage to restrict output if the user applies too much signal.
The unit has 24 VDC backup input with built in
24 VDC battery charger. A separate battery charger is, therefore, not required. The charger charges the battery with a 0.5 A constant current until the battery voltage reaches 27.4 VDC. The charger then switches over to constant voltage charging (also known as float charging).
Note
When using the unit with backup power of 24 V, make sure that the unit is always powered ON. When the unit is switched OFF, the batteries will be drained as this will be regarded as a power source. Consequently the unit will revert to
24 VDC power from the 24 V input
CALL STATION |
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0
C all O nly
0 0
PTT
0
P hantom |
Power |
LINE /MIC
LINE /MIC
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| 70 V | |
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| Amplifier |
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| 8 Ohm | |
INS | INS |
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O ut | In |
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| C lic k |
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| s uppressi on |
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Bal. input
Zone 2
Music only / Line out
0
0
Zone 1
Zone 1
LINE /MIC
LINE /MIC
115 V,2 3 0 V
D.C.supply
CUSL
2 01
Wall Panel input micro controller
figure 2.1: Schematic overview of the Plena Mixer Amplifier
Bosch Security Systems